Tom Baker

The Doctor

Lalla Ward

Romana

David Brierly

K9 (voice)

Lewis Fiander

Tryst

David Daker

Rigg

Geoffrey Bateman

Dymond

Jennifer Lonsdale

Della

Stephen Jenn

Secker

Richard Barnes

Crewman

Barry Andrews

Stott

Geoffrey Hinsliff

Officer Fisk

Peter Craze

Officer Costa

Annet Peters

Passenger

Lionel Sansby

Passenger

Maggie Petersen

Passenger

Sebastian Stride

Crewman

Eden Phillips

Crewman

Rupert Jarvis

Costume Design

Roger Cann

Production Design

Joan Stribling

Makeup Artist

Carolyn Montagu

Production Assistant

Peter Hider

Camera Operator

Dick Mills

Special Sound Effects

Warwick Fielding

Lighting Director

Anthony Philpot

Sound

Rod Waldron

Editor

Colin Mapson

Visual Effects

Alan Bromly

Director

Bob Baker

Writer

Graham Williams

Producer

Graham Williams

Director

Douglas Adams

Script Editor

Dudley Simpson

Original Music Composer

Mitch Mitchell

Visual Effects

Delia Derbyshire

Theme Song Performance